Valve testing that does not interfere with the production process

Partial Stroke Testing is a practice in many refineries that does not cause significant interference or failure of the valve test to the manufacturing process. The shut-off valve, which is normally activated by a solenoid valve, is in a safety circuit and is the operator's first choice f

4S shop to pay attention to what issues?

With the progress of society, everybody has a vehicle to replace the step tool, then when people buy a car, they usually choose to go to the 4S shop to purchase, in the face of so many 4S shop, how do we c

US standard screws and specifications

American screw

a. Usually indicated by a number, such as #2-56, #4-40, #6-32, #8-32, #10-24...etc.

b. Or expressed in English

Such as 0.086-56, 0.112-40, 0.138-32, 0.164-32, 0.190-24...etc.

Ex: 632 – 8 – PPB:

Kaifeng Longyu polyformaldehyde plant put into operation

The first batch of 40,000 tons/year polyoxymethylene unit of Kaifeng Longyu Chemical Co., Ltd., which was contracted by the 11th Construction and Construction Company, was successfully fed once in a single day. The finished polyoxymethylene finished product was successfully produced. The total